Dell OptiPlex 390 Owners Manual - Page 71

If two or more memory modules are installed, remove the modules, then re-install one module

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LED Power Button • If the problem persists, the system board is faulty. Problem Description A possible coin cell battery failure has occurred. Troubleshooting Steps Remove the coin cell battery for one minute, reinstall the battery, and restart. LED Power Button Problem Description Troubleshooting Steps LED A possible processor failure has occurred. Re-seat the processor. Power Button Problem Description Memory modules are detected, but a memory failure has occurred. Troubleshooting Steps • If two or more memory modules are installed, remove the modules, then re-install one module and re-start the computer. If the computer starts normally, continue to install additional memory modules (one at a time) until you have identified a faulty module or reinstalled all modules without error. 71

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•
If the problem persists, the system board is faulty.
LED
Power Button
Problem Description
A possible coin cell battery failure has occurred.
Troubleshooting Steps
Remove the coin cell battery for one minute, reinstall
the battery, and restart.
LED
Power Button
Problem Description
A possible processor failure has occurred.
Troubleshooting Steps
Re-seat the processor.
LED
Power Button
Problem Description
Memory modules are detected, but a memory failure has
occurred.
Troubleshooting
Steps
•
If two or more memory modules are installed,
remove the modules, then re-install one module and
re-start the computer. If the computer starts
normally, continue to install additional memory
modules (one at a time) until you have identified a
faulty module or reinstalled all modules without
error.
71